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hep-th2026
The Hydrotope in the Water-Wave Action
Qu Cao, Song He, Jirong Jing +1
The Hydrotope gives a geometric representation of tree-level water-wave amplitudes with two negative spatial momenta as the volume of a hyperplane slice of a box. We trace the orig…
hep-th2026
NLSM amplitudes from a quartic two-derivative theory
Qu Cao, Zhenqi Han, Fan Zhu
We revisit the well-known nonlinear sigma model (NLSM), an effective field theory describing the scattering of Goldstone bosons and characterized by an infinite to…
hep-th2026
Uniqueness and Analytic Structures of Bosonic String Effective Amplitudes
Qu Cao, Fan Zhu
We revisit the zero-transcendentality sector of bosonic string effective amplitudes with spin-1 external states, conjectured to correspond to a mass-deformed theory, known…